So Trump wanted Mueller to become FBI director in the first term. It was then his admin who hired him and he could have fired Mueller at any point in time and didn't. That is Trump messing himself up not anyone else.

You are forgetting that in his first term as well Never Trump Republicans were all over the place in the House and Senate. That is no longer the case as Trump turned out to not be a fad but rather someone who has staying power and is the face of the Party.

Mass demonstrations have already applied for permits in DC on Dec. 6 and 20th to protest Trump.

Since Trump is now essentially a one-term president those people tend to poll better even if polling itself is awful and inaccurate as hell.

Also there is a whole new movement to get the current Congress, since it doesn't chance till the 3rd, to make moves to disqualify Trump even though he won due to "insurrection and Rebellion" via the 14th amendment. Granted this isn't going to happen and he won the Popular Vote but still the Dem and MSM machine doesn't stop churning.